package com.huang.community.service.Imp;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.huang.community.pojo.Message;
import com.huang.community.service.UserService;
import com.huang.community.common.CommunityConstant;
import com.huang.community.mapper.LoginTicketMapper;
import com.huang.community.mapper.UserMapper;
import com.huang.community.pojo.LoginTicket;
import com.huang.community.pojo.User;
import com.huang.community.util.CommunityUtil;
import com.huang.community.util.EmailCilent;
import com.huang.community.util.HostHolder;
import com.huang.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.util.HtmlUtils;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * 用户 服务类
 * @author TianTian
 * @date 2022/4/28 22:35
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper,User> implements UserService, CommunityConstant {
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private EmailCilent EmailCilent;

    @Autowired
    private TemplateEngine templateEngine;
//    @Autowired
//    private LoginTicketMapper loginTicketMapper;
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private HostHolder hostHolder;


    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;
    //查找用户
    public User findUserById(int id) {
//        return userMapper.selectById(id);
        User user = getCache(id);
        if (user == null) {
            user = initCache(id);
        }
        return user;
    }

    //用户注册
    public Map<String, Object> register(User user) {
        Map<String, Object> map = new HashMap<>();

        // 空值处理
        if (user == null) {
            throw new IllegalArgumentException("参数不能为空!");
        }
        if (StringUtils.isBlank(user.getUsername())) {
            map.put("usernameMsg", "账号不能为空!");
            return map;
        }
        if (StringUtils.isBlank(user.getPassword())) {
            map.put("passwordMsg", "密码不能为空!");
            return map;
        }
        if (StringUtils.isBlank(user.getEmail())) {
            map.put("emailMsg", "邮箱不能为空!");
            return map;
        }

        // 验证账号
        User u = userMapper.selectOne(new QueryWrapper<User>().eq("username", user.getUsername()));
        if (u != null) {
            map.put("usernameMsg", "该账号已存在!");
            return map;
        }

        // 验证邮箱
        u = userMapper.selectOne(new QueryWrapper<User>().eq("email", user.getEmail()));
        if (u != null) {
            map.put("emailMsg", "该邮箱已被注册!");
            return map;
        }

        // 注册用户
        user.setSalt(CommunityUtil.generateUUID().substring(0, 5));
        user.setPassword(CommunityUtil.md5(user.getPassword() + user.getSalt()));
        user.setType(0);
        user.setStatus(0);
        user.setActivationCode(CommunityUtil.generateUUID());
        user.setHeaderUrl(String.format("http://images.nowcoder.com/head/%dt.png", new Random().nextInt(1000)));
        user.setCreateTime(new Date());
        userMapper.insertUser(user);

        // 激活邮件
        Context context = new Context();
        context.setVariable("email", user.getEmail());
        // http://localhost:8080/community/activation/101/code
        String url = domain + contextPath + "/activation/" + user.getId() + "/" + user.getActivationCode();
        context.setVariable("url", url);
        String content = templateEngine.process("/mail/activation", context);
        EmailCilent.sendHtmlMail(user.getEmail(), "激活账号", content);
        return map;
    }
    //激活注册用户
    @Transactional(rollbackFor = Exception.class)
    public int activation(int userId, String code) {
        User user = userMapper.selectById(userId);
        if (user.getStatus() == 1) {
            return ACTIVATION_REPEAT;
        } else if (user.getActivationCode().equals(code)) {
            userMapper.updateStatus(userId, 1);
            clearCache(userId);
            return ACTIVATION_SUCCESS;
        } else {
            return ACTIVATION_FAILURE;
        }
    }
    //通过名字查找用户
    @Override
    public User selectUserByname(String username) {
        return this.baseMapper.selectOne(new QueryWrapper<User>().eq("username", username));
    }

    //登录验证
    @Override
    public Map<String, Object> login(String username, String password, int expiredSeconds) {
        Map<String, Object> map = new HashMap<>();

        // 空值处理
        if (StringUtils.isBlank(username)) {
            map.put("usernameMsg", "账号不能为空!");
            return map;
        }
        if (StringUtils.isBlank(password)) {
            map.put("passwordMsg", "密码不能为空!");
            return map;
        }

        // 验证账号
        User user = userMapper.selectOne(new QueryWrapper<User>().eq("username", username));
        if (user == null) {
            map.put("usernameMsg", "该账号不存在!");
            return map;
        }

        // 验证状态
        if (user.getStatus() == 0) {
            map.put("usernameMsg", "该账号未激活!");
            return map;
        }

        // 验证密码
        password = CommunityUtil.md5(password + user.getSalt());
        if (!user.getPassword().equals(password)) {
            map.put("passwordMsg", "密码不正确!");
            return map;
        }

        // 生成登录凭证
        LoginTicket loginTicket = new LoginTicket();
        loginTicket.setUserId(user.getId());
        loginTicket.setTicket(CommunityUtil.generateUUID());
        loginTicket.setStatus(0);
        loginTicket.setExpired(new Date(System.currentTimeMillis() + expiredSeconds * 1000));
//        loginTicketMapper.insertLoginTicket(loginTicket);
        String ticketKey = RedisKeyUtil.getTicketKey(loginTicket.getTicket());
        redisTemplate.opsForValue().set(ticketKey,loginTicket);
        map.put("ticket", loginTicket.getTicket());
        return map;
    }
    //退出登录状态
    @Override
    public void logout(String ticket) {
        String ticketKey = RedisKeyUtil.getTicketKey(ticket);
        LoginTicket t = (LoginTicket)redisTemplate.opsForValue().get(ticketKey);
        t.setStatus(1);
        redisTemplate.opsForValue().set(ticketKey,t);
//        loginTicketMapper.updateStatus(ticket, 1);
    }
    //查找登录凭证
    @Override
    public LoginTicket findLoginTicket(String ticket) {
        String ticketKey = RedisKeyUtil.getTicketKey(ticket);
        return (LoginTicket) redisTemplate.opsForValue().get(ticketKey);
    }
    //更新头像
    @Override
    public int updateHeader(Integer userId, String headerUrl) {
//        return userMapper.updateHeader(userId, headerUrl);
        int rows = userMapper.updateHeader(userId, headerUrl);
        clearCache(userId);
        return rows;
    }




    //这里准备先从Threadloacl中取数据 修改 再去存入数据库和更新线程副本
    @Override
    @Transactional(rollbackFor = Exception.class)
    public Map<String, Object> updatePassword(String oldPassword, String newPassword, String confirmPassword) {
        Map<String, Object> map = new HashMap<>();
        map.put("flag", false);
        User user = hostHolder.getUser();
        oldPassword = CommunityUtil.md5(oldPassword + user.getSalt());
        if (!user.getPassword().equals(oldPassword)) {
            map.put("oldMsg", "密码不正确!");
            map.put("flag", true);
            return map;
        }
        if (!newPassword.equals(confirmPassword)) {
            map.put("confirmMsg", "两次密码不一致");
            map.put("flag", true);
            return map;
        }
        newPassword = CommunityUtil.md5(newPassword + user.getSalt());
        user.setPassword(newPassword);
        hostHolder.setUser(user);
        userMapper.updateById(user);
        clearCache(user.getId());
        return map;
    }
    // 1.优先从缓存中取值
    private User getCache(int userId) {
        String redisKey = RedisKeyUtil.getUserKey(userId);
        return (User) redisTemplate.opsForValue().get(redisKey);
    }

    // 2.取不到时初始化缓存数据
    private User initCache(int userId) {
        User user = userMapper.selectById(userId);
        String redisKey = RedisKeyUtil.getUserKey(userId);
        redisTemplate.opsForValue().set(redisKey, user, 3600, TimeUnit.SECONDS);
        return user;
    }

    // 3.数据变更时清除缓存数据
    private void clearCache(int userId) {
        String redisKey = RedisKeyUtil.getUserKey(userId);
        redisTemplate.delete(redisKey);
    }
    @Override
    public Collection<? extends GrantedAuthority> getAuthorities(int userId) {
        User user = this.findUserById(userId);
        List<GrantedAuthority> list = new ArrayList<>();
        list.add(new GrantedAuthority() {
            @Override
            public String getAuthority() {
                switch (user.getType()) {
                    case 1:
                        return AUTHORITY_ADMIN;
                    case 2:
                        return AUTHORITY_MODERATOR;
                    default:
                        return AUTHORITY_USER;
                }
            }
        });
        return list;
    }
}

